Warp-clamp



J. B. SINDERSON. WARP CLAMP. APPLICATION man AUG.22. 1911.

1,342,876. 1 Patented June 8, 1920.-

UNITED STATES PATEli"? OFFICE.

JOHN B. SINDERSON, OF ROCKFORD, ILLINOIS, ASSIGNOR, BY MESNEASSIGNMENTS, TO BARBER-COLMAN COMPANY, OF ROCKFORD, ILLINOIS, ACORPORATION OF ILLINOIS.

WARP-CLAMP.

Specification of Letters Patent.

Patented June 8, 1920.

Application filed August 22, 1917. Serial No. 187,521.

To all whom it may concern:

Be it known that I, J OHN B. SINDERSON, a citizen of the United States,residing at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in arp-Clamps, ofwhich the following is a specificatiom The object of this invention isto provide an improved clamp for holding a warp or series of warpthreads firmly enough to permit 0f tensioning the threads suflicientlyfor the proper operation of thread-selecting and separating devices, andstill allow each warp thread to be pulled out of the clamp by the needleor other operating device.

In the accompanying drawings Figure 1 is a fragmental front elevation ofa warp clamp embodying the features of my 1nvention. Fig. 2 is atransverse sectional View of the clamp showing the same in the openedcondition. Fig. 3 is an end elevatlon of the clamp showing the sameclosed. Fig. 4 is a sectional view of the closed clamp. Fig. 5 is aperspective view of a spring clip forming part of the clamp. Fig. 6 is afragmental top plan View showing the clamp closed.

The improvement is capable of use in connection with warp drawing, warptying, lease-picking, and various other classes of machines foroperating upon warps.

The embodiment herein shown of the invention comprises a bar 1 ofangular crosssection supported in any suitable manner, as, for example,by means of brackets 2 attached to the supporting frame (not shown) ofthe machine. Suitably fastened to .the inner faces of the flanges of thebar 1 are two longitudinal strips 3 of friction material, as rubber, thestrips being of uniform thickness. The clamp further comprises a roller4 provided with trunnions 5 which are loosely mounted in bearings 6carried by arms 7. The arms 7 are pivotally supported in any suitablemanner, being herein shown as pivoted to the brackets 2 at 8. The roller4 is of uniform diameter and is covered with suitable friction material9. WVhile various materials may be employed, satisfactory results havebeen obtained with a woven fabric known as No. 22 felt cloth. The roller4 is so mounted as to bear against the two rubber strips 3 when the arms7 occupy the position shown in Figs. 1, 3, 4'

and 6. The trunnions 5 are loosely supported in the bearings 6 in orderto permit the roller 4 to seat itself with equal pressure against bothof the rubber strips 3. The roller is held firmly pressed toward the bar1 by means of any desired number of spring clips 10 adapted to embracesaid roller and bar. The clips 10 may be of any necessary stiffness.

When the clamp is open as shown in Fig. 2 the roller 4 is supported in asuitable man ner, as, for example, by engagement of the ends of thetrunnions 5 with the brackets 2.

Assuming that the clamp is open and that the end of the warp a is heldin a plush clamp or other suitable holder 6, the oper ation of loadingthe clamp is as follows: The warp is drawn towardthe bar 1 and laidacross said bar with the plush clamp b hanging in the space between thebar 1 and the roller 4, as shown in Fig. 2. The roller is then swungupward and forward against the warp, and a suitable number of springclips 10 are put in place to cause the roller 4 to clamp the warpthreads firmly against the rubber strips 3. The clamp b is then removedand the ends of the threads trimmed to the desired length.

By reason of the character and arrangement of the friction surfaces andthe pressure exerted by the clips 10, the threads are held withsufficient firmness to allow the threads to be given the tensionnecessary for the satisfactory operation of warpthread selecting andseparating devices, but not so tightly that they cannot be withdrawnfrom the clamp by a warp-drawing needle or other operating device.

The roller 4 may be turned to distribute the wear of the frictionmaterial 9.

If desired, the threads may be tightly gripped in the clamp, so thatthey cannot be pulled out, by using a suflicient number of clips 10 ofthe required stiffness.

While I have described the present embodiment of the invention withconsiderable particularity, it will be understood that the invention isnot limited to the construction herein disclosed, and that variousmodifications may be made without departing from the scope of theinvention as defined by the appended claims.

I claim as my invention:

1. A warp clamp having, in combination,

supporting means, a clamp member connected to said supporting means andhaving two spaced friction surfaces, arms pivoted to the supportingmeans, a clamp member carried by said arms and arranged to be swung intoand out of operative relation to the first mentioned clamp member, thesec- 0nd mentioned clamp member being loosely connected to said arms soas to be free to seat itself against said surfaces, and means forpressing said clamp members together.

2. A warp clamp having, in combination, supporting means, a clamp memberconnected to said supporting means, arms pivoted to the supporting meansbehind the clamp member, a clamp member carried by said arms andarranged to be swung into and out of operative relation to the firstmentioned clamp member, there being a space between said clamp memberfor the insertion of a warp clamp when the second mentioned clamp memberis in inoperative position, and means for pressing said clamp memberstogether when the second mentioned clamp is in operative position.

3. A warp clamp having, in combination, an angular bar, a friction stripsecured to the inner face of each flange of the bar, said strips beingspaced apart, a member having a rounded friction surface adapted topress a sheet of warp threads a ainst the faces of said strips, andmeans for pressing together the bar and said member.

4. A warp clamp having, in combination, two parallel friction strips,the faces of said strips lying in planes extending at an angle to eachother, a roller, and a friction covering for the roller, said rollerbeing arranged to press a sheet of warp threads into the angle betweenthe faces of the friction strips.

5. A warp clamp having, in combination,

an angular bar, a rubber strip secured to the inner face of each flangeof the bar, a roller having a covering of felt cloth, mem bers forsupporting said roller for movement toward and away from said rubberstrips, the roller being loosely connected to said members, and meansfor pressing the roller toward the bar.

6. A warp clamp having, in combination, two parallel friction stripsspaced apart, the faces of said strips lying in planes extending at anangle to each other, and a member having a rounded friction surfaceadapted to press a sheet of warp threads intothe angle between the facesof the friction strips.

In testimony whereof, I have hereunto set my hand.

JOHN B. SINDERSON.

